package com.coder520.common.interceptor;

import com.coder520.user.entity.User;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class SessionInterceptor implements HandlerInterceptor{
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {

        StringBuffer url = request.getRequestURL();
        if ((url.indexOf("login")>=0)||(url.indexOf("sign")>=0)||(url.indexOf("error")>=0)){
            return true;
        }
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("user");

        if (user!=null){
            return true;
        }
        //转发页面
        request.getRequestDispatcher("/login").forward(request,response);

        return false;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}
